What a CCTV AMC should actually include

The failure an AMC exists to prevent

CCTV rarely announces its own failure. A lens fogs, a camera gets knocked out of alignment by a delivery, a disk fails, or retention quietly shortens when channels are added. The system keeps showing live pictures throughout.

The failure is discovered at the worst possible moment: when footage is requested and it does not exist. Everything a good AMC does is aimed at that single scenario.

Scheduled visits, at a frequency that matches the site

The contract should state how many visits per year and roughly when. "As required" is not a maintenance arrangement — it is a call-out agreement with a fee attached.

Frequency should follow conditions. Coastal salt air, dusty industrial sites, kitchens and heavily external installations degrade far faster than a clean air-conditioned office, and should be visited more often.

Verified playback of the oldest available footage

This is the step to look for, and the one most often missing. A visit that confirms cameras are live proves almost nothing; a visit that plays back footage from the oldest day still on the recorder proves recording and retention are both real.

If a proposed AMC does not include playing back old footage and confirming retention in days, ask for it in writing. It is the difference between maintaining a system and dusting it.

The physical work on each visit

Most of what keeps CCTV useful is unglamorous and physical.

• Lens and housing cleaning at every camera
• Mounts checked and tightened, and any drifted camera returned to its intended view
• Cabling, connectors and terminations inspected where accessible
• Recorder condition, ventilation, temperature and fans checked
• Disk health checked, with failing disks flagged for replacement before they fail
• Power arrangement, including any backup power, verified

Settings, updates and creeping changes

Systems drift through use. A channel added last year, a resolution raised, a motion setting changed by someone experimenting — each one alters storage arithmetic and coverage.

The AMC should include reviewing recording settings against what you were originally promised, and applying firmware or software updates deliberately where appropriate. Blanket automatic updating of surveillance equipment is not always the right choice, and a good contractor will explain their approach rather than either ignoring updates or applying them blindly.

What is included versus chargeable — in writing

The most common source of AMC disputes is the boundary. Replacement parts, additional cameras, cabling damaged by third parties and repairs beyond a certain scale are usually chargeable, and that is reasonable — provided it is written down before you sign.

Also ask what happens between visits when something fails, and what the contract says about attendance for faults.

A written record per visit

Each visit should leave behind a record: what was checked, what was corrected, retention confirmed in days, and anything you should plan for such as disk replacement.

That record is what turns maintenance into an audit trail. Without it, system condition is a matter of memory — and usually somebody else's.

If your system was installed by someone else

Taking over a third-party system should start with a condition assessment. It protects you as much as the contractor, because it establishes in writing what was already wrong before anyone became responsible for it.

Be wary of any contractor willing to sign an AMC on an unfamiliar system without inspecting it first.